.banner-middle ul img {
    width: 100%;
    height: 100%;
}
.banner-middle {
    position: relative;
}
.banner-middle ul {
    width: 100%;
    height: 100%;
    position: relative;
}

.banner-middle ul li {
    width: 100%;
    height: 100%;
    position: absolute;
    left: 0;
    top: 0;
    display: none;
}

.banner-middle ul li img {
    width: 100%;
    height: 100%;
}

.banner-middle .current {
    display: block;
    /* background-color: salmon; */
    background-color: #fff;
}

.banner-middle ol {
    width: 120px;
    height: 40px;
    /* background-color: rgba(0, 0, 0, 0.5); */
    border-radius: 10px;
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
}

.banner-middle ol li {
    float: left;
    width: 20px;
    height: 20px;
    margin: 10px 10px;
    border-radius: 50%;
    background-color: rgba(0, 0, 0, 0.5);;
}

.banner-middle .left {
    text-decoration: none;
    display: block;
    width: 40px;
    height: 40px;
    text-align: center;
    line-height: 40px;
    font-size: 20px;
    color: #fff;
    background-color: rgba(0, 0, 0, 0.5);
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    left: 0;
}

.banner-middle .right {
    text-decoration: none;
    display: block;
    width: 40px;
    height: 40px;
    text-align: center;
    line-height: 40px;
    font-size: 20px;
    color: #fff;
    background-color: rgba(0, 0, 0, 0.5);
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    right: 0;
}